Golf-club shaft



' June 10, 1930.

H. K. B. DAVIS GOLF CLUB SHAFT Filed May 26. 1926 Patented June 10, 1930t STATES HENRY K. B. DAVIS, or NEW YoRK, 1\TQY. essieivoa'ro SWINGRITEb., we; or mow.

' DENCE, nnonnrsnenn i r GOLF-CLUB SH FT;

Application filed May 26, 19,26; Serial n f i teo.

V This invention relates to shafts for golf 7 clubs and particularly tothose clubs which The hickory shafts are too soft and provide too muchfiexibility necessitating the culling of a large number of shafts tofind the re quired number of shafts of proper flexibility 10 for thefirst grade clubs. Ash has been tried but is also too soft and tooflexible to give the best results.

Steel shafts have been in some instances been found to give goodresults, but the average good golf player will not use it as it isconsidered by some, to be too quick. In

other words, there is a different air resistance in the downward strokewhich requires an alteration in style of stroke. To increase the size ofthe steel shaft to produce the desired air resistance would mean anincrease in the weight of the club'or a decrease in the thickness tosuch a degree that it would be 7 sections in a portionof the shaft,terminate difficult to work in manufacture.

'The primary object of my invention is to provide a built up shaft whichin addition to having the advantages usually found in built upstructures such as uniform quality and resistance to weather conditions,canbe made to combine the qualities of anytwo materials 7 to be used toproduce in the shaft the qualities of the materials in a varying degreedepending upon the position and amount'of the materials used, in otherwords to obtain the exact desired effect. 7

Another object of the invention is the provision of a golf club shaftwhich has the proper torsional and bending flexibilities while at thesame time has the proper cross 40 section and with a decrease in weight.

Other and further objects of this invention will be apparent to oneskilled in the art, from a reading of the complete specification andclaims.

Referring to the drawing wherein I have illustrated one embodiment of myinvention.

Fig. 1 is a perspective view of a golf club shaft made according to myinvention.

Figs. 2 and 3 are enlarged cross sectional views made perpendicular tothe axis of the and 3-3, respectively.

lected, for example, two materials which have produced remarkably goodresults:

shaft at about the positions of the lines 22 v These are bamboo andhickory. Ithas been foundin actual practice that a 'six sectional shaftmade according to my inventionas illustrated provides astructure which.produces in actual vpractice an increasein flight yards which Iexplainas being probablydue to'a'combination of thejqualities of the two Imaterialsand the construction which takes advantage of these'qualities.f

In the" embodiment herein illustrated, I show. a shaft' made havlng si-xsections, each section having two surfaces whichare adj acent surfacesof adjacent sections and which liein planes at 60.to eachiother.

In the embodiment illustratedI have indicated three .alternate:s'ections'which are made of bamboo and are. designated by the numeral10. It will be observed that these filled with glue and have designatedat 11.

At another portion of the shaft,in the-embodi- 7 sections 1O'and 12 allextend substantially to the axisof the shaft, thus leaving no space inthe interior of the'body of the shaft. Between the alternate sections 10of ham- In the manufacture of my improved shaft,

the pieces are cut to desired size and shape to ment illustrated, itwill be observed that'the produce the desired effect and the faces to besecured together are made to a proper angle so that when assembled.there will be practically no space between, any two adjacen faces. 7 a.7 From the above, it will beseen that I have combined thecliaracteristicsof the twomagood characteristics of both materials.

' terials to produce a structure which hasthe For i by the lack ofstiffness of the other wood as hickory. This combination gives astructure having the correct amount of bendability. Further the hickorygives torsional strength 5 to the shaft and prevents breaking whichmight occur in an all-bamboo structure. These advantages have beenobtained while still making possible the maintaining of the standardsize shaft and at an actual saving in weight to be handled.

While I have shown and described an embodiment of my invention indetail, I desire to have it understood that I do not limit myself to theexact details of the showing and description but that modifications andchanges may be made in the materials and number, relative number, shape,relative size cutting with relation to grain and angles of cut of thepieces, without departing from the 0 spirit of my invention and withinthe scope of the appended claims.

Having described my invention what I claim is.:

1. A shaft for golf clubs having a plurality of sections securedtogether, two of the adjacent sections being of difierent material andhaving adjacent surfaces in planes passing substantially through theaxis of the shaft, some of the sections having portions an ending shortof the axis of the shaft and other sections extending substantially tothe axis of the shaft. 7

. 2; A shaft for golf clubs having a plurality of sections securedtogether, the adjacent sections being of different. material and havingadjacent surfaces in planes passing substantially through the axis ofthe shaft, alternate sections of the shaft having portions stoppingshort of the axis of the shaft and the sec- 40 tions therebetweenextending substantially to the axis of the shaft. 7

3. A shaft for golf clubs having a plurality ofsections securedtogether, the adjacent sections being of different material andhavingadjacent surfaces in planes passing substantially through the axis ofthe shaft, alternate sections of the shaft having portions stoppingshort of the axis of the shaft and the sections therebetween havingportions extending substantially to the axis of the shaft,

the spaces between the alternate sections and the axis beingfilled witha suitable glue-like substance. V

4. A shaft for golf clubs having a plurality of sections'securedtogether, the adjacent sections'being of bamboo and another wood,respectively, and having adj acent surfaces in planes passingsubstantially through the axis of the shaft, some sectionsof the shaftas having portions ending short of the axis of the shaft and othersections extending substantially to the axis of the shaft.

In testimony whereof I hereunto aflix my signature.

05 HENRYK. B. DAVIS.

